Their / There vs They're

1. Their: The Possessive Pronoun

Their is a possessive pronoun that shows ownership or belonging. It's the plural form of "his" or "her," and it answers the question "whose?" Use "their" when something belongs to multiple people or to a singular "they": "The students forgot their textbooks." Think of the word "heir" hidden inside "their" — heirs inherit possessions.

You can always test if "their" is correct by substituting it with "our" or "his/her." If the sentence still makes grammatical sense, you've chosen correctly. "Their dog is friendly" works just like "Our dog is friendly" or "His dog is friendly." The structure is identical because they're all possessive pronouns.

2. There: The Location Word and Expletive

There has two main uses. First, it indicates location or position — the opposite of "here." "The book is over there on the shelf." Second, it acts as an expletive (a dummy subject) to introduce a clause: "There are three reasons why..." or "There is a problem." Notice how "here" is contained within "there" — both words refer to places.

When "there" introduces a clause (there is, there are, there was, there will be), it's not really pointing to a location. Instead, it's a grammatical placeholder that allows you to delay the real subject: "There are five people waiting" (five people are the real subject). This construction is extremely common in English.

3. They're: The Contraction

They're is simply a contraction of "they are." The apostrophe replaces the missing "a" from "are." Use it exactly as you would use "they are": "They're planning to arrive early" means "They are planning to arrive early." This is the easiest of the three to verify — just expand the contraction.

If you can't replace "they're" with "they are" and have the sentence make sense, you've chosen the wrong word. "They're house is beautiful" doesn't work because "They are house is beautiful" is nonsense. You need "Their house is beautiful" instead. The substitution test never fails for contractions.

4. Common Contexts and Collocations

Their appears before nouns and noun phrases: "their ideas," "their responsibility," "their turn to speak," "on their behalf," "to their credit," "their point of view." It always shows possession and is followed by what is being possessed.

There appears in location contexts ("over there," "right there," "there and back") and in existential constructions ("there is," "there are," "there seems to be," "there remains"). It can also appear in phrases like "there you go," "here and there," or "neither here nor there."

They're is followed by a verb, adjective, or adverb that describes what "they" are doing or being: "they're working," "they're happy," "they're always late," "they're not coming." It functions exactly like any subject-verb combination.

5. Memory Tricks and Mnemonics

The T-H-E-I-R breakdown: "THEIR" contains "HEIR," and heirs inherit property (possession). This visual reminder helps you remember that "their" is about ownership.

The T-H-E-R-E breakdown: "THERE" contains "HERE," and both words refer to locations. "Here and there" are opposites, so they share similar structures.

The apostrophe rule: "THEY'RE" has an apostrophe because it's a contraction. The apostrophe always signals missing letters. If there's no contraction needed, there's no apostrophe.

The sentence test: Try this sentence to remember all three: "They're over there in their house." Each word serves a different grammatical function, and you can verify each one with the appropriate substitution test.

6. Why This Confusion Matters

Confusing these three words is one of the most common errors in written English, and it's particularly noticeable in professional contexts. Emails, reports, presentations, and social media posts with their/there/they're errors can undermine your credibility. While spell checkers catch many typos, they can't catch homophone errors because all three spellings are correct words.

The error is especially common in informal writing like text messages and social media, where autocorrect might "fix" the wrong word, or where people write quickly without proofreading. However, in professional or academic writing, these mistakes stand out immediately to careful readers. Taking the extra moment to apply the substitution tests ensures you use the correct form every time.

❌ Incorrect: "The team celebrated there victory."

Why it's wrong: You need a possessive pronoun here (the victory belongs to the team), not a location word.

✅ Correct: "The team celebrated their victory."

❌ Incorrect: "Their going to be late for the meeting."

Why it's wrong: You need "they are" (going), which contracts to "they're." "Their" is possessive and doesn't make sense here.

✅ Correct: "They're going to be late for the meeting."

❌ Incorrect: "Put the boxes over they're."

Why it's wrong: You need a location word, not a contraction. "They're" means "they are," which makes no sense in this context.

✅ Correct: "Put the boxes over there."

❌ Incorrect: "I think there right about this issue."

Why it's wrong: You need "they are" (right), which contracts to "they're." "There" doesn't work as a subject.

✅ Correct: "I think they're right about this issue."

❌ Incorrect: "The students submitted they're final projects."

Why it's wrong: You need a possessive (the projects belong to the students), not a contraction meaning "they are."

✅ Correct: "The students submitted their final projects."

❌ Incorrect: "Their is no excuse for being unprepared."

Why it's wrong: You need the expletive "there" to introduce the clause, not the possessive "their."

✅ Correct: "There is no excuse for being unprepared."